[AT] repairing machined arts

[Ken Knierim]

Yes, they have a Mythbusters Junior show (which inspired my son to want to
be on the show) and some other spinoffs.
As far as printed parts taking over for more traditional (casting and
machining), I still believe in "good, fast, or cheap. Pick 2".
I use printed parts in different designs but nothing seriously structural.
And if I want something to last, it's usually NOT plastic.

Call me old fashioned.

Ken in AZ

On Fri, Dec 6, 2019 at 3:57 PM <szabelski at wildblue.net> wrote:

> If you remember the TV series “Myth Busters”, there is a new show emceed
> by one on the guys (believe it’s Jamie), who does a lot of similar things
> to what they did on MB. I caught one show where they were making an Ironman
> suit made from titanium so they could prove/disprove some of its
> capabilities. Some of the parts for the suit of armor were made using 3D
> printing and powdered titanium. Didn’t take that long to make the parts. I
> think I also saw a program somewhere were something was being made using
> powdered iron (????).
>
> Don’t know how well other metals could be adapted to a process like that,
> but if the technology can be properly developed, and the cost can be kept
> down, could this be the beginning of the end for all types of machined/cast
> parts? If so, would a repair shop still have to carry a large inventory of
> parts, or just make a needed part using a 3D printer and the proper
> material on the spot as needed?
>
> “Yes sir, you say you need a new engine block for your 1920 vintage
> tractor? Just come back tomorrow and it’ll be ready.”
>
> Carl
>
>
> ----- Original Message -----
> From: Ken Knierim <ken.knierim at gmail.com>
> To: Antique Tractor Email Discussion Group <at at lists.antique-tractor.com>
> Sent: Fri, 06 Dec 2019 15:16:47 -0500 (EST)
> Subject: Re: [AT] repairing machined arts
>
> Some progress has been made toward taking digital photographs of the
> original part and creating a 3D model from them (photogrammetry). I have
> the software (as part of a 3D printer package) but have not tried it yet so
> I cannot vouch for the accuracy. I'm still new to 3D printing but we've
> already put several parts into production systems... it's got its place.
> The photogrammetry process might be a decent place to start if you want to
> make a casting but I'd question accuracy for finished parts. The laser scan
> technique would be better in my opinion.
>
> Something along similar lines for making parts is 3D metal printing. The
> Rutherford rocket engines are made using this technology. It uses an
> electron beam rather than a laser for melting the metal and requires a
> vacuum chamber for manufacturing but obviously works with high pressures
> and temperatures.
>
> Photogrammetry software:
> https://all3dp.com/1/best-photogrammetry-software/
>
> Rutherford rocket engine:
> https://en.wikipedia.org/wiki/Rutherford_(rocket_engine)
>
> I see these as interesting ways of creating parts. As with anything, it's
> going to take some work to perfect. I doubt it would be affordable for
> tractor parts for awhile.
>
> Ken in AZ
>
>
>
> On Fri, Dec 6, 2019 at 10:48 AM Jack <jacktractor at live.com> wrote:
>
> > The shortcoming of this for the repair of unavailable tractor parts is
> > that you need a Cad file of a good part first.
> >
> >
> >
> https://www.imeche.org/news/news-article/feature-retrofit-transforms-legacy-machine-tools-to-keep-worn-parts-in-use?utm_campaign=PE%20newsletter%2C%206%20December&utm_source=email&utm_medium=PE%20Newsletter
> > _______________________________________________
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